chore: add workflow to deploy docs page (#17)

Author: ota-meshi

.github/workflows/GHPages.yml

@@ -0,0 +1,45 @@
+name: Deploy to GitHub Pages
+
+on:
+    push:
+        branches: [main]
+    workflow_dispatch: null
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+    contents: read
+    pages: write
+    id-token: write
+
+# Allow one concurrent deployment
+concurrency:
+    group: pages
+    cancel-in-progress: true
+
+jobs:
+    deploy:
+        environment:
+            name: github-pages
+            url: ${{ steps.deployment.outputs.page_url }}
+        runs-on: ubuntu-latest
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v3
+            - uses: actions/setup-node@v3
+              with:
+                  node-version: 18
+            - name: Install Packages
+              run: npm ci
+            - name: Build docs
+              run: |+
+                  export NODE_OPTIONS=--openssl-legacy-provider
+                  npm run docs:build
+            - name: Setup Pages
+              uses: actions/configure-pages@v2
+            - name: Upload artifact
+              uses: actions/upload-pages-artifact@v1
+              with:
+                  path: ./docs/.vuepress/dist
+            - name: Deploy to GitHub Pages
+              id: deployment
+              uses: actions/deploy-pages@v1

docs/.vuepress/config.js

@@ -1,6 +1,7 @@
 "use strict"
 
 module.exports = {
+    base: "/eslint-utils/",
     title: "@eslint-community/eslint-utils",
     description: "Utilities for ESLint plugins and custom rules.",
     serviceWorker: true,